Puzzle.



A. P. DULGEROFF.

PUZZLE. APPLICATION FILED MAYQ, 1914 Patented Feb. 23, 1915.

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A. P. DULGEROFF.

PUZZLE.

APPLICATION IILBD MAY 9, 1914.

Patented Feb. 23, 1915 2 SHEETS-SHEET 2.

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ATANAS IE. DULGEROFF, OF GRANITE CITY, ILLINOIS.

PUZZLE.

AppIication filed May 9, 1914.

To all whom it may concern:

Be it known that I, ATANAS P. DULenRoFr, citizen of the United States, residing at Granite City, in the county of Madison and State of Illinois, have invented certain new and useful Improvements in Puzzles, of which the following is a specification, reference being had to the accompanying drawings.

This invention relates to puzzles, and has for its primary object to provide a novel and interesting device of this character of that type commonly known as block puzzles, the solution of which presents an exceedingly perplexing problem to the mind of thew'ould-be solver, and affords quite a severe test for the ingenuity and patience.

The invention has for another object to provide a device of the above character consisting essentially of a plurality of interfitting blocks, which when properly assembled upon each other in their relative positions, will present a symmetrical figure The invention has for another object to provide a puzzle, which, while difficult of solution, will also afford considerable amusement and pleasure.

The invention has for a further object to produce a puzzle in which the several parts are of exceedingly simple form so that the device may be manufactured and retailed at small cost.

With the above and other objects in View, the invention consists in novel features of construction, combinatiomand arrangement of parts as will be hereinafter referred to and more particularly pointed out in the specification and claim.

For a full understanding of the invention, reference is to be had to thefollowing description and accompanying drawing, in which- Figure 1 is a perspective view showing all of the parts of the puzzle properly assembled; Fig. 2 is a similar view illustrating the first step in the solution of the puzzle; Fig. 3 is a perspective view illustrating the next step; Fig. 4: is a similar view showing the puzzle in a more advanced stage of completion; Fig. 5 is a perspective view showing the final step before inserting the key sections; Fig. 6 is a horizontal section;

Fig. 7 is a detail perspective view of the locking block; Fig. 8 is a similar view of one of the base blocks, andFig. 9 is a detail perspective view of the key sections.

Specification of Letters Patent.

Patented Feb. as, rare.

Serial N0. 837,544.

Fig. 10 is a similar view of one of the blocks 8.

Referring in detail tothe drawings 5 and 6 respectively designate two pairs of blocks which may properly be termed the base blocks, because upon the same the remaining elements of the puzzle are assembled and interlocked in connection therewith. An additional base block 7 is also provided. These blocks designated by the numerals 5, 6, and 7 are all of the same length, and are appreciably longer than the remaining blocks of the puzzle to be hereinafter referred to. These base blocks (5 in number), and all of the shorter blocks 8 (17 in number) have their end faces beveled or inclined, as at 10, thereby providing the shoulders 11 upon one side of the body of the block. The block 9, similar in form to the blocks 8 and hereinafter referred to as the locking block, is also centrally provided in one edge with a recess 12 for a purpose which will be fully pointed out'in the following description wherein I have set forth the manner of solving the puzzle.

In addition to the blocks above referred to, a key is also provided, and said key consists of two sections indicated at 13, each of which is provided with a beveled end face 14: and a shoulder 15 similar to the ends of the blocks 8. The opposite end of said key section is also beveled, as shown at 16, for a purpose to be later referred to.

The first step in arriving at a correct solution of the puzzle is to place the two base blocks 5in parallel relation with their beveled ends facing each other, and then arrange one of the blocks 8, indicated at a, between the base blocks 5 at each end thereof. The shoulders upon the respective blocks a extend inwardly toward each other, while the fiat outer faces of said blocks are engaged against the shoulders 11 of the base blocks 5. Two of the blocks 8, indicated at b, are then arranged upon each end of the base blocks 5 on the opposite sides there of, the shoulders 11 of the respective pairs of blocks 6 extending toward each other over the outer faces of the base blocks 5. The shoulders 11 of the blocks a extend upon the outer faces of the blocks 6. After the blocks a and b have been assembled upon the base blocks 5, as above explained, the pair of base blocks 6 are then assembled upon each other with their beveled ends facing and the additional base block 7 is disposed between the blocks 6 in a plane at right angles thereto. One of the blocks 8, shown at c, is also arranged between the blocks 6 and engaged with the shoulders 11 on one end thereof while a pair of blocks 6] are engaged upon the opposite sides of the. base blocks 6 with the shoulders of the blocks 0 engaging over the faces of said blocks (Z. After the blocks 0 and (Z and the base block 7 have been properly assembled upon one end of the blocks 6, said latter blocks are inserted between the opposed faces of the blocks 5 and between the pairs of blocks 5. This arrangement of the parts is shown in Fig. 3 of the drawings.

In the next step in the solution of the puzzle, a block e, corresponding to the block 0, is arranged between the blocks 6 at their outer ends and against the shoulders 11. A block f is then fitted into position between one of the shoulders 11 on the block 6 and the blocks 6, the shoulders of said block f engaging over the outer faces of the respective blocks 6. The locking block 9 above referred to is then engaged upon the opposite end of the block 6, the recess 12 in the edge of said block 9 receiving the beveled end of the block 0. When the block 9 is moved inwardly so as to engage the shoulders thereof over the outer faces of the blocks 6, the recess 12 thereof will be unnoticed and said block will present the same appearance as the remaining blocks 8. This arrangement of the several elements is shown in Fig. 4: of the drawings. It will be observed from reference to said figure that the base block 7 is disposed between the blocks 6 upon one side of the base blocks 5, while an open space, indicated at 17, remains between the opposed faces of the blocks 6 and between the blocks 5 and the blocks 9 and f. Into this space the key sections 14 are adapted to be finally inserted.

Against the outerface of one of the base blocks 5 and between the projecting ends of the spaced pairs of blocks 7), the blocks 9 are engaged, the shoulders on one end of said blocks engaging over the outer face of the base block 7. A similar pair of blocks h are also engaged against the outer face of the other base block 5 between the opposite ends of the spaced pairs of blocks 6 and are engaged upon the opposite end of the block 7 A single block 70 is then fitted between. the shoulders 11 on the ends of the 7 base block 7 and the pairs of blocks 9 and h respectively, the shoulders on the ends of these latter blocks is engaging over the outer faces of the blocks 9 and h. The key sections 13 are now inserted into opposite ends of the opening 17, the beveled end faces 16 of said key sections frictionally engaging with each other to spread and force apart the inner ends of said sections, and thus tightly bind the shoulders 15 on their outer ends against the outer faces of the blocks 70. After the key sections have been inserted, all of the blocks are securely locked together. It will be seen from reference to Fig. 1 that the puzzle when solved presents a symmetrical outline. The device includes twenty-five separate elements, and while at first the puzzle may appear to be almost unsolvable, one may soon become so familiar with the proper assemblage of the several blocks as to be able to very quickly and properly put the same together to form the completed figure.

From the foregoing description taken in connection with the accompanying drawings, it is believed that the construction and manner of operation will be clearly understood. My improved puzzle provides a highly amusing and interesting article, which requires the exercise of considerable ingenuitv in mastering the solution thereto, and to this extent affords an exercise for the mental faculties. As the several blocks constituting the puzzle are of extremelv simple form, it will be also appreciated that the device can be manufactured at comparativelv small cost.

What is claimed is:

A block puzzle including five long base blocks 5, 6 and 7 and seventeen relativelv short blocks 8. said blocks being identical in form and each provided upon its opposite ends with a shoulder, an additional short block 9 also having shoulders on its ends for engagement with the respective outer faces of a pair of said base blocks. said latter block being further provided with a central recess in one edge to receive the shoulder on one end of one of said short blocks, said blocks having interfitting engagement upon each other and presenting when assembled a key receiving opening. and two key block sections 13 adapted to be inserted from opposite directions into said opening to retain the blocks in their assembled relative positions.

In testimony whereof I hereunto afiix my signature in the presence of two witnesses. ATANAS P. DULGEROFF.

Witnesses:

D. R. SrAIKoFr, J. M. BROWN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

